Set of headphones



FIG. 1 is a perspective view of a set of headphones showing our new design, the opposite side is a mirror image;

FIG. 2 is a top view of the set of headphones;

FIG. 3 is a bottom view of the set of headphones;

FIG. 4 is a back view of the set of headphones; and,

FIG. 5 is a right side view of the set of headphones. 

We claim the ornamental design for a set of headphones, as shown and described. 